(19)
(11) EP 0 272 517 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.03.1990 Bulletin 1990/12

(43) Date of publication A2:
29.06.1988 Bulletin 1988/26

(21) Application number: 87117973.5

(22) Date of filing: 04.12.1987
(51) International Patent Classification (IPC)4: G03G 15/00
(84) Designated Contracting States:
DE FR GB

(30) Priority: 05.12.1986 JP 186875/86 U
25.12.1986 JP 202741/86 U

(71) Applicant: Ricoh Company, Ltd
Ohta-ku Tokyo 143 (JP)

(72) Inventors:
  • Kasahara, Nobuo
    Yokohama-shi Kanagawa-ken (JP)
  • Nakahara, Toshio
    Yokohama-shi Kanagawa-ken (JP)

(74) Representative: Schwabe - Sandmair - Marx 
Stuntzstrasse 16
81677 München
81677 München (DE)


(56) References cited: : 
   
       


    (54) Device for driving a photoconductive element of an electrophotographic copier


    (57) A device for driving a photoconductive drum (70) of an electrophotographic copier and others is operable without the need for gears, a toothed belt and other transmission mechanisms. An outer roller type drive motor (80) is interposed between the drum (70) and a drum support shaft (76) such that an outer wheel portion of the motor drives the drum by way of an engaging member. Those members with which the body of the motor and that of the copier are engaged are made of a vibration-damping material. Tapered portions which are axially movable into and out of contact with each other are provided in a drive transmitting section with which an output portion of the motor and one end of the drum are engageable. Pressing means (100) for causing one end of the drum into contact with the outer wheel portion of the motor through the tapered portions is provided at the other end of the drum.







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